Evaporated water goes into the clouds, comes down as rain, and evaporates again
Protects, helps thermoregulate, provides sense of touch, helps remove waste
The Sun and the planets formed together, 4.6 billion years ago, from a cloud of gas and dust called the solar nebula. A shock wave from a nearby supernova explosion probably initiated the collapse of the solar nebula. The Sun formed in the center, and the planets formed in a thin disk orbiting around it
